Hunter Spring Frictional Teeth for EMF Cable Termination
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Solution Overview
Problem
The existing methods for detaching EMF shielding cable sheaths from backshell adapter connectors using Hunter springs are difficult and often result in damage to the spring, surrounding braid sheathing, or personal injury due to the need for counter-circumferential force application, which can lead to EMF leaks.
Innovation Solution
The Hunter spring is modified by forming radially outwardly extending frictional teeth at its outer end, allowing for easier unwrapping and installation by providing a frictional interface for fingertip pressure without contacting the sharp spring edge, thus preventing damage and leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the Hunter spring is used to anchor the EMF shielding sheath, then the sheath can be securely attached to the backshell adapter connector, but the spring creates a sharp edge that can cut the technician's fingertip or fingernail during detachment
Solution Approach 1:
The patent applies local quality by modifying only the outer end of the Hunter spring with frictional teeth, while maintaining the smooth continuous structure of the rest of the spring body. This localized modification provides a friction interface for safe fingertip engagement during detachment, while preserving the spring's overall clamping function and structural integrity.
2Ease of operation
If a tool such as a knife or screwdriver blade is used to pry the Hunter spring end, then the spring can be unwrapped, but the spring and surrounding braid sheathing may be damaged, threatening EMF leaks
Solution Approach 1:
The frictional teeth act as an intermediary structure between the technician's fingertip and the Hunter spring body. This intermediate friction interface allows controlled unwrapping through direct finger pressure, eliminating the need for external tools that could damage the spring or surrounding braid sheathing, thereby preserving EMF shielding integrity.
3Ease of operation
If fingertip pressure is applied to the Hunter spring end, then detachment can be attempted, but the spring steel edge may cut the fingertip and fail to commence unwrapping
Solution Approach 1:
The patent converts the potentially harmful sharp edge of the Hunter spring into a beneficial friction interface by forming radially outwardly extending frictional teeth at the outer end. These teeth transform the cutting hazard into a controlled friction engagement that enables safe and effective fingertip-based unwrapping.
4Stability of the object's composition
If the Hunter spring is designed with a smooth continuous structure, then it provides uniform clamping force, but it lacks a friction interface for easy fingertip engagement during installation and detachment
Solution Approach 1:
The patent applies local quality by modifying only the outer end of the Hunter spring with frictional teeth, while maintaining the smooth continuous structure of the rest of the spring body. This localized modification provides a friction interface for safe fingertip engagement during detachment, while preserving the spring's overall clamping function and structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The frictional teeth enable safe and efficient detachment and installation of the Hunter spring, preventing damage to the spring and surrounding components while maintaining effective EMF shielding.
Implementation Method 1
The frictional teeth enable safe and efficient detachment and installation of the Hunter spring, providing a frictional interface for fingertip pressure
Data Source
AI summary
An assembly for terminating a sheathed cable harness at an electrical component port, the assembly incorporating a nipple having a hollow bore fitted for receiving the cable harness; a coupling nut mounting the nipple upon the electrical component, the coupling nut being connected to the nipple's proximal end, and being adapted for aligning the hollow bore with the electrical component's port; and a Hunter spring annularly clamping the cable harness's sheath to the nipple, the Hunter spring having an outer end and a plurality of radially outwardly extending teeth, the radially outwardly extending teeth being positioned at the spring's outer end.